/**j-Interop (Pure Java implementation of DCOM protocol)
 * Copyright (C) 2006  Vikram Roopchand
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3.0 of the License, or (at your option) any later version.
 *
 * Though a sincere effort has been made to deliver a professional,
 * quality product,the library itself is distributed WITHOUT ANY WARRANTY;
 * See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 */

package org.jinterop.winreg;

import java.net.UnknownHostException;

import org.jinterop.dcom.common.IJIAuthInfo;
import org.jinterop.winreg.smb.JIWinRegStub;

/**
 * Factory to get an implementation of <code>IJIWinReg</code>.
 * <p>
 * This interface uses "Windows Remote Registry" and "Server" services and these
 * must be running on target workstation.
 * 
 * @since 1.0
 */
//based upon the transport intended to be used this
//factory provides either the smb impl of ijiwinreg or the tcp/ip one.
public class JIWinRegFactory
{

    private JIWinRegFactory ()
    {
    };

    private static JIWinRegFactory factory = null;

    /**
     * Instantiates the Factory.
     * 
     * @return
     */
    public static JIWinRegFactory getSingleTon ()
    {
        if ( factory == null )
        {
            synchronized ( JIWinRegFactory.class )
            {
                if ( factory == null )
                {
                    factory = new JIWinRegFactory ();
                }
            }
        }

        return factory;
    }

    /**
     * Gets an Implementation of WinReg interface, currently only SMB transport
     * is supported.
     * 
     * @param authInfo
     *            credentials for access to Windows Remote Registry service
     * @param serverName
     *            target server
     * @param smbTransport
     *            true if SMB transport is required , false will return null.
     * @return
     * @throws UnknownHostException
     */
    public IJIWinReg getWinreg ( final IJIAuthInfo authInfo, final String serverName, final boolean smbTransport ) throws UnknownHostException
    {
        if ( smbTransport )
        {
            return new JIWinRegStub ( authInfo, serverName );
        }
        else
        {
            return null;
        }
    }

    /**
     * Gets an Implementation of WinReg interface, currently only SMB transport
     * is supported.
     * 
     * @param smbTransport
     *            true if SMB transport is required , false will return null.
     * @return
     * @throws UnknownHostException
     */
    public IJIWinReg getWinreg ( final String serverName, final boolean smbTransport ) throws UnknownHostException
    {
        if ( smbTransport )
        {
            return new JIWinRegStub ( serverName );
        }
        else
        {
            return null;
        }
    }
}
